Abstract Magnetic Fe3O4/graphene oxide (GO) composite particles with excellent properties of magnetic susceptibility and hydrophilicity were synthesized by a facile one-step chemical coprecipitation method. Then the prepared magnetic Fe3O4/graphene oxide (MGO) particles were introduced to polyvinylidene fluoride (PVDF) casting solution to fabricated PVDF/MGO hybrid membrane under the magnetic field. The directional migration and ordered arrangement of MGO sheets in magnetic field were investigated. The preparation of multilayer composite membrane was in the form of functional layer and support substrate in series, in which the functional layer with MGO orderly embedded into the membrane surface was prepared via magnetic field induced MGO sheets to the membrane surface during the phase inversion process. There was obvious effects of this novel structure on the pure water flux, hydrophilicity and antifouling properties of the membranes. The PVDF/MGO membranes showed high pure water flux (484 L m−2 h−1) and high flux recovery ratio (up to 83.0%).

中文翻译：

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磁场诱导Fe 3 O 4 /GO复合颗粒有序排列制备Fe 3 O 4 /GO/PVDF膜

摘要 通过简便的一步化学共沉淀法合成了具有优异磁化率和亲水性的磁性Fe3O4/氧化石墨烯(GO)复合颗粒。然后将制备的磁性 Fe3O4/氧化石墨烯 (MGO) 颗粒引入到聚偏二氟乙烯 (PVDF) 浇铸溶液中，在磁场下制备 PVDF/MGO 杂化膜。研究了MGO片在磁场中的定向迁移和有序排列。多层复合膜的制备采用功能层和支撑基板串联的形式，其中MGO有序嵌入膜表面的功能层是在相转化过程中通过磁场诱导MGO片接触膜表面制备的。这种新型结构对膜的纯水通量、亲水性和防污性能有明显的影响。PVDF/MGO 膜显示出高纯水通量（484 L m-2 h-1）和高通量回收率（高达 83.0%）。